Safety syringe abstract
A safety syringe device includes a tube mounted to the first end
of the barrel and the needle extends through the tube. A sleeve
is slidably mounted to the first end of the barrel and encloses
the tube therein. A metal cover is pivotably connected to an edge
of the first end of the sleeve and biased to contact the needle
assembly when the sleeve is not yet pulled to its operation position.
The metal cover is pivoted to seal the first end of the sleeve when
the sleeve is pulled to its operation after the syringe process
is completed. The needle is bent by the metal cover when pushing
the sleeve back toward the barrel.
Safety syringe claims
What is claimed is:
1. A safety syringe device comprising: a barrel having a finger
flange at a first end thereof and a connection port extending from
a second end of the barrel; a plunger having a stopper at a first
end thereof and a thumb rest at a second end of the plunger, the
stopper movably received in a passage of the barrel; a needle assembly
having a locking tip and a needle which extends from the locking
tip which is connected to the connection port; a tube having a first
end and a second end which is fixedly connected to the first end
of the barrel and the needle extending through the first end of
the tube, and a sleeve slidably mounted to the barrel and the tube,
a cover pivotably connected to an edge of a first end of the sleeve
and a part of the cover being biased to contact the needle assembly
when the sleeve is positioned in a ready position, the cover being
pivoted to cover the first end of the sleeve when the sleeve is
pulled in a direction away from the barrel and positioned at an
operation position.
2. The safety syringe device as claimed in claim 1 wherein the
first end of the barrel includes a first inclined end surface and
the second end of the tube has a second inclined end surface which
is matched with the first inclined end surface.
3. The safety syringe device as claimed in claim 1 wherein a positioning
flange extends outward from the first end of the tube and a groove
is defined in an inner periphery of the second end of the sleeve,
the positioning flange engaged with the groove when the sleeve is
positioned at the operation position.
4. The safety syringe device as claimed in claim 1 wherein a positioning
groove is defined in an inner periphery of the first end of the
sleeve so that the cover is stopped by and engaged with the positioning
groove when the cover covers the first end of the sleeve.
5. The safety syringe device as claimed in claim 1 wherein a notch
is defined in an inner periphery of the tube and a leading edge
of the cover is engaged with the notch when the sleeve is in ready
position.
6. The safety syringe device as claimed in claim 1 wherein two
lugs extend from the edge of the first end of the sleeve and the
cover is pivotably connected to the two lugs on the sleeve with
a torsion spring connected between the cover and a pin extending
through the two lugs.
Safety syringe description
FIELD OF THE INVENTION
The present invention relates to safety syringe device having a
needle bending device which bends the needle after the syringe is
used.
BACKGROUND OF THE INVENTION
A conventional hypodermic syringe is disclosed in FIGS. 1 and 2
and generally barrel 80 with a plunger 82 movably received therein.
A needle assembly 81 has a locking tip 812 which is secured to the
connection port 801 of the barrel 80 and a needle 811 is connected
to a needle hub on the locking tip 812. The user may use two fingers
to pull the finger flange 802 on the barrel 80 and push the plunger
82 toward the needle 811 to eject the medicine in the barrel 80
from the needle 811. A cap 83 is used to be mounted to the locking
tip 812 so as to cover the needle 811 such that the user is not
hurt by the needle 811. Nevertheless, the nurses are often hurt
by the needles when re-capping the cap 83 and this makes the nurses
under a tremendous risk of being affected by various types of diseases.
Although there are safety syringe devices developed in the market,
a complex mechanism is involved during retrieving the needles into
the barrel after the process of injection is completed. In other
words, those safety syringe devices are so expensive that only a
small part of the hospitals afford then.
The present invention intends to provide a safety syringe device
that includes a simple means which bends the needles after the injection
is completed.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is
provided a safety syringe device which comprises a barrel with a
plunger movably inserted therein and a needle assembly with a needle
is connected to the connection port of the barrel. A tube has a
first end and a second end which is fixedly connected to the first
end of the barrel and the needle extends through the first end of
the tube.
A sleeve is slidably mounted to the barrel and the tube. A cover
is pivotably connected an edge of a first end of the sleeve and
a part of the cover is biased to be stopped by in contact with the
needle assembly when the sleeve is positioned in a ready position.
The cover is pivoted to cover the first end of the sleeve when the
sleeve is pulled away from the barrel and positioned at an operation
position.
The present invention will become more obvious from the following
description when taken in connection with the accompanying drawings
which show, for purposes of illustration only, a preferred embodiment
in accordance with the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded view to show a conventional hypodermic syringe;
FIG. 2 shows a cap is to be mounted to the needle assembly of the
conventional hypodermic syringe;
FIG. 3 is an exploded view to show the safety syringe device of
the present invention;
FIG. 4 is a perspective view to show the safety syringe device
of the present invention;
FIG. 5 shows the needle is located beneath the cover when the sleeve
is pulled to the operation position;
FIG. 6 is a cross sectional view to show the safety syringe device
of the present invention when the sleeve is not yet pulled;
FIG. 7 is a cross sectional view to show the safety syringe device
of the present invention when the sleeve is pulling;
FIG. 8 is a cross sectional view to show the safety syringe device
of the present invention when the sleeve is fully pulled;
FIG. 9 shows the needle is bent by the cover;
FIG. 10 shows a notch is in the tube to engage the cover;
FIG. 11 shows an enlarged view to show the notch engaging the cover;
FIG. 12 shows that the needle assembly is to be connected to the
connection port of the barrel;
FIG. 13 is an exploded view to show another embodiment of the present
invention, and
FIG. 14 is an enlarged view to show the cover is connected to the
sleeve by lugs and a torsion spring.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIGS. 3 4 and 6 the safety syringe device of the
present invention comprises a barrel 2 having a finger flange 22
at a first end thereof and a connection port 210 extending from
a second end of the barrel 2. A first inclined end surface 21 is
defined in the first end of the barrel 2. A plunger 3 has a stopper
31 at a first end thereof and a thumb rest 32 at a second end of
the plunger 3 the stopper 31 is movably received in a passage of
the barrel 2. A needle assembly 1 has a locking tip 12 and a needle
11 which extends from the locking tip 12 which is connected to the
connection port 210.
A tube 6 has a first end 61 and a second end 62 which has a second
inclined end surface 64 so as to be matched with the first inclined
end surface 21 of the barrel 2. The tube 6 is fixedly connected
to the first end of the barrel 2 and the needle 11 extends through
the first end 61 of the tube 6. A positioning flange 63 extends
outward from the first end 61 of the tube 6.
Further referring to FIG. 12 a sleeve 5 is slidably mounted to
the barrel 2 and the tube 6. The needle assembly 1 is connected
to the connection port 210 of the barrel 2 before it is to be used.
A cover 53 made of metal is pivotably connected an edge of a first
end 51 of the sleeve 5 at a portion 532 of the cover 53 and an edge
531 of the cover 53 extends out from the first end of the sleeve
5. A part of the cover 53 is biased to contact the needle assembly
1 when the sleeve 5 is positioned in a ready position as shown in
FIG. 6. A groove 54 is defined in an inner periphery of the second
end of the sleeve 5 and a positioning groove 55 is defined in an
inner periphery of the first end of the sleeve 5.
After injection, as shown in FIGS. 7 to 9 the sleeve 5 is pulled
in a direction away from the barrel 2 and the cover 53 in the sleeve
5 is pivoted to contact the needle 11 till the sleeve 5 is positioned
at its operation position when the positioning flange 63 of the
tube 6 is engaged with the groove 54 of the sleeve 5. At the operation
position, the cover 53 is completely pivoted and covers the first
end of the sleeve 5. The cover 53 is engaged with the positioning
groove 55 of the sleeve 5 as shown in FIG. 8. The sleeve 5 is then
pushed back till the needle 11 is bent by the cover 53 as shown
in FIG. 9.
As shown in FIGS. 10 and 11 a notch 65 may be defined in the inner
periphery of the tube 6 and a leading edge of the part of the cover
53 that is located in the tube 6 is engaged with the notch 65 when
the sleeve 5 is in ready position.
FIG. 13 shows that two lugs extend from the edge of the first end
of the sleeve 5 and the cover 53 is pivotably connected to the two
lugs on the sleeve 5 with a torsion spring 57 connected between
the cover 53 and a pin 56 extending through the two lugs.
While we have shown and described the embodiment in accordance
with the present invention, it should be clear to those skilled
in the art that further embodiments may be made without departing
from the scope of the present invention.
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